User1

Encrypt

Outgoing

One-to-one output

Group output

Incoming

One-to-one Received

Group received

Tasks

User 2

Encrypt

Outgoing

One-to-one output

Group output

Incoming

One-to-one Received

Group received

Tasks

User 3

Encrypt

Outgoing

One-to-one output

Group output

Incoming

One-to-one Received

Group received

Tasks

User 4

Encrypt

Outgoing

One-to-one output

Group output

Incoming

One-to-one Received

Group received

Tasks